Chemical Engineering - Heat Transfer

36.
Evaporation of 1kg of water from a solution in a single effect evaporator requires about __________ kg of steam.
0.4 - 0.6
1-1.3
1.8-2
2 - 2.4
Answer: Option
Explanation:
No answer description is available. Let's discuss.

37.
A metal wire of 0.01 m dia and thermal conductivity 200 W/m.K is exposed to a fluid stream with a convective heat transfer coefficient of 100 W/m2.K. The Biot number is
5.6
0.025
3.5
0.0035
Answer: Option
Explanation:
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38.
Analogy between mass and heat transfer is not applicable in case of
same velocity profile or equal eddy diffusivities.
thermal or pressure mass diffusion.
viscous heating or chemical reaction.
both (b) and (c).
Answer: Option
Explanation:
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39.
A __________ surface has the maximum thermal emissivity out of the following.
black & smooth
black & rough
white & smooth
white & rough
Answer: Option
Explanation:
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40.
Radiant energy received by a body is proportional to (where, d = the distance between the object emitting radiation and that receiving it.)
d
d
d2
d1.5
Answer: Option
Explanation:
No answer description is available. Let's discuss.